CPU: Z-80A
Clock speed: 3.58 MHz
RAM: 1k
Video RAM: 16k
Video Display Processor: Texas Instruments TMS9928A
Sprites: 32
Colors: 16
Sound Processor: Texas Instruments SN76489AN, 3 tone channels, 1 noise
Cartridge ROM: 8k/16k/24k/32k

Colecovision Zone

This is a comprehensive site with information on the Colevision, it's accessories and games.

Videopac.nl

A site with a lot of information on the Videopac (the European version of the O2). It also hosts an active Odyssey 2/Videopac forum.

Colecovision Programming

Colecovision Tech Information
Colecovision Sound Information

TMS9928 Video Display Controller

Data Sheet (Off site link)
Less Technical Description (geared towards the Spectravision)

SN76489 Sound Chip

Here are some links to good Colecovision emulators:

Colem by Marat Fayzullin

An excellent emulator that has been around for a long time. You will fnd versions of colem for many different platforms.

MAME/MESS by the MESS/MAME team

Multi-system emulator available for many platforms.

The following are schematics that I have traced out by hand. I cannot guarantee that these schematics are accurate, or that they are the same for all versions of a piece of equipment.

Colecovision System Schematic